My second question: Do Jill Stein supporters think that by going negative on Bernie Sanders and Our Revolution, they will pick up more support and donations from Sanders supporters?

Like most of the Left, Jill Stein supporters are a herd of cats with many different personal opinions on every subject. Many Bernie supporters -- including those who don't support Dr. Stein -- felt betrayed by Bernie's endorsement of the Queen of Hearts ("Off with their heads!") even though Bernie had made it clear throughout the campaign that he would support the eventual nominee. Some have lashed out and I understand that. It's easy to build expectations of a candidate beyond what he or she has actually said and then get upset when those expectations aren't fulfilled.

Some Jill Stein supporters may think that portraying Bernie and Our Revolution as selling out to Hillary will create "free radicals" who can then re-bind to Jill Stein. Personally, I prefer attracting support to Jill Stein by pointing out that Dr. Her is the only non-republican running at this point.

Bernie did in fact promise to stay in the race until the convention. With his public endorsement of Clinton in NH he essentially conceded prior to the convention. Therefore, imho the disappointment felt by many Bernie supporters is well founded.

Yeah but many are to the right of Gary Johnson but still probably will. Donald trump won most independent in the primary. I think many right leaning independents will go to clinton tbh. This is stein has such an uphill battle. Bit Progressives will vote for her ! Still doesn't appeal to a major part of the US electorate .. Still think like 10 percent of the 43 percent used to be republican... But will be interesting to see if trump wins independents on election day.

Thanks for your thoughtful response. I have to agree that the "free radicals" theory is flawed. The most likely result is disillusionment in politics in general and lower voter turnout.

Bernie made the best choice possible to retain momentum and power for progressives in US politics. He's keeping the movement together and using it's strength to get more progressives in office. He's helping them use the power of their vote and support to shift power in Congress, change the national conversation about issues.